Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 481 · 40 questions

Engineer's tip (Find the topic, use the idea): Find the topic: force, friction, machine, lever class, balance, pulley or work. Use that lesson’s rule — what is in the middle, load × distance = effort × distance, effort = load ÷ ropes, work = force × distance. Write the calculation before you answer.

1. 1.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) use a smaller force (c) stop all friction (d) switch off gravity
2. 2.True or false: pushing a trolley is a push. (a) False (b) True
3. 3.⚖️ A seesaw balances. Arjun (320 N) sits 1 m from the pivot on one side; Zoya (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
5. 5.True or false: a movable pulley is on a flagpole top. (a) True (b) False
6. 6.🏋️ A force of 450 N did 4050 J of work. How many metres did the object move?
7. 7.💪 Which force is at work: squeezing a lemon? (a) friction (b) magnetic force (c) gravity (d) muscular force
8. 8.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
9. 9.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 50 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
10. 10.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
11. 11.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
12. 12.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a smaller rod (axle) (c) a loose rope (d) a sharp wedge
13. 13.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
14. 14.💪 In a tug of war, one team pulls right with 85 N and the other pulls left with 65 N. What is the size of the net force, in newtons?
15. 15.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
16. 16.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a carpet 10 N, sandpaper 11 N, ice 3 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
18. 18.⚖️ A seesaw balances. Zoya (? N) sits 2 m from the pivot on one side; Arjun (380 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
19. 19.True or false: a crane hook block is a lever. (a) True (b) False
20. 20.True or false: a fixed pulley needs effort = load. (a) False (b) True
21. 21.True or false: a grippy rubber sole gives more friction. (a) False (b) True
22. 22.💪 Which force is at work: rain falls to the ground? (a) friction (b) magnetic force (c) gravity (d) muscular force
23. 23.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
24. 24.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a seesaw (c) a well winch handle (d) a crowbar
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a carpet 8 N, sandpaper 12 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
26. 26.True or false: a fixed pulley rises with the load. (a) False (b) True
27. 27.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) distance from fulcrum (d) time taken
28. 28.🛞 How can we reduce friction in a machine? (a) press parts harder (b) make parts rough (c) add sand (d) oil the moving parts
29. 29.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
30. 30.True or false: pulling a cart is a pull. (a) False (b) True
31. 31.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
32. 32.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) the fulcrum moves (d) both weights are equal
33. 33.Which of these is caused by muscular force? (a) rain falls to the ground (b) shoes grip the floor (c) lifting a school bag (d) a thrown ball comes down
34. 34.⚖️ A seesaw balances. Arjun (200 N) sits 2 m from the pivot on one side; Kabir (200 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
36. 36.🏋️ A force of 440 N pushes a cart 7 m along the floor. How much work is done, in joules?
37. 37.💪 Which force is at work: shoes grip the floor? (a) gravity (b) magnetic force (c) muscular force (d) friction
38. 38.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) near the fulcrum (c) on the fulcrum (d) far from the fulcrum
39. 39.⚖️ A lever bar balances. The load is 400 N at 30 cm from the fulcrum. The effort is 300 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
40. 40.🏋️ A force of 450 N did 1350 J of work. How many metres did the object move?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids